Audi Q2 Cruise Control Failure Leaves Owners Stranded

Had a very similar issue with my 2021 Audi Q3. With some experience working on modern cars, I can share what happened in my case. The symptoms were identical, cruise control failure, warning lights, and error codes. After initial diagnostics, it turned out the throttle body connections were compromised. The main issue was a faulty system involving corroded plug connections leading to the throttle body sensor. Had it fixed at a workshop where they: 1. Performed complete diagnostics 2. Cleaned the connector ports 3. Replaced damaged wiring 4. Tested all throttle body functions Total cost was 95 Euro for parts and labor. The repair resolved all issues and the cruise control has worked flawlessly since. Before suggesting specific solutions, could you share: What error codes are you getting? Does the throttle respond normally during regular driving? Are there any other non-functional systems besides the cruise control? Have you checked the fuse box related to these systems? This information would help determine if your issue matches what I experienced with the connection problems.

Thanks for the insights. Just had my service at 10000KM last week. Based on the diagnostics readout, Im getting error code P2176 related to the throttle actuator control system. The throttle response feels slightly delayed during normal driving, especially when accelerating from a stop. Besides the cruise control, the automatic start-stop system also stopped working. I checked all related fuses in the fuse box and they appear intact. These symptoms started appearing after a particularly rainy week, which makes me think moisture might have affected some connections. Does this sound similar to the throttle body issue you encountered?

Thanks for providing those details. Yes, this sounds nearly identical to what I experienced with my Q3. The error code P2176 and symptoms after rain exposure match my situation perfectly. The delayed throttle response combined with the non-functional cruise control and start-stop system strongly points to moisture affecting the throttle body connections. In my case, water had seeped into the actuator housing, causing corrosion at the connection points. A clear sign of this issue is when multiple related systems become non-functional simultaneously. The cruise control, throttle response, and start-stop system all rely on proper communication with the throttle actuator. While the fuses in the fuse box might look fine, the core issue likely lies with corroded connections rather than a blown fuse. The rainy conditions you mentioned often trigger these problems by allowing moisture to reach sensitive electronic components. Based on the repair cost for my Q3, you should expect around 100-150 Euro for a similar fix, depending on whether any components need replacement beyond cleaning and reconnection. Would recommend having this checked soon, as continued moisture exposure could lead to more extensive damage to the throttle actuator system.

The symptoms you describe match exactly with my issues, especially the connection between the rain exposure and the malfunction appearing. Your experience gives me more confidence about the likely cause. Looking at the car electronics now, all signs point to moisture-affected connections in the throttle actuator system, particularly given the matching error code P2176 and the similar symptoms with the delayed throttle response. The repair cost range of 100-150 Euro sounds reasonable for the diagnostics and repair work. Since my car is still under warranty, I will have the dealer perform a complete check of the actuator system and connections. Will make sure they thoroughly inspect all electronic components related to the cruise control for any moisture damage. I will book an appointment right away to prevent any additional issues from developing. Thanks for sharing your experience, it helped narrow down the potential causes and gave me a clearer picture of what to expect during the repair process.

Hello, I own a 2017 Q2 TFSI with 88,000 km, a very reliable car despite a cruise control failure three times. I presented it three times to the AUDI dealership in Gironde and each time they did an update, and the problem is recurring because it comes back after a while. Since then I haven't insisted and I drive without cruise control, which is still a shame that they can't find the origin of the failure with all the intervention means they have. If by chance you have had the same problem and solved it, then I am interested. Thank you in advance for your feedback.

(community_translated_from_language)

Hello, I own a 2017 Q2 TFSI with 88,000 km. It's a very reliable car despite a cruise control failure on three occasions. I presented it three times to the AUDI dealership in Gironde and each time they did an update, but the problem is recurring because it comes back after a while. Since then I haven't insisted and I drive without cruise control, which is a shame that they can't find the origin of the failure with all the intervention means they have. If by chance you have had the same problem and solved it, then I am interested. Thank you in advance for your feedback.

(community_translated_from_language)

Check if there are any loose or corroded connections in the cruise control system, particularly around the throttle body and actuator. Moisture or dirt can sometimes cause intermittent issues. If you're comfortable, inspect these areas for any visible signs of damage or corrosion. If the problem persists, it might be worth seeking a second opinion from another mechanic or dealership. Let me know how it goes or if you have further questions!

Check if there are any loose or corroded connections in the cruise control system, particularly around the throttle body and actuator. Moisture or dirt can sometimes cause intermittent issues. If you're comfortable, inspect these areas for any visible signs of damage or corrosion. If the problem persists, it might be worth seeking a second opinion from another mechanic or dealership. Let me know how it goes or if you have further questions!